For the packaging lines which require large quantities of melted materials, the Company TECNICOLL has implemented a quick, continuous melting system, with controlled temperatures. The solid product, which is continuously supplied, comes into contact with the melted mass at liquid state, thus avoiding altering the temperature of the product being dosed. Thanks to this system, it is possible to avoid interrupting the production for the change of the tanks or the dangerous topping-up of melted material. Furthermore, it keeps unaltered the chemical properties of the product components since the product keeps its temperature for a limited period, thus avoiding losses of volatile parts and fragrances.